AMP + Subwoofer installation

[Maniac Felgas]

Hi,

I have a 2019 SEAT Ibiza and I'm trying to install an amplifier and subwoofer in the trunk.

I've already run the power cable from the battery to the trunk. Since I didn't want to cut into the car's original wiring, I bought a plug-and-play adapter with RCA outputs and a remote wire that connects directly between the factory head unit (located in the glovebox) and the original wiring harness. I also ran the RCA and remote cables to the trunk.

For the ground connection, I used a bolt located underneath the rear seats.

The amplifier and subwoofer were previously installed in my Mk1 Leon and were working perfectly. The wiring kit is from Focal and is the same one I used before without any issues.

Everything seemed fine during the installation, but I'm having a problem: the subwoofer doesn't produce any sound at all. The factory speakers are working normally, and I have both power and remote signal at the adapter and at the amplifier.

If I disable the LPF (Low Pass Filter), I can hear music coming from the subwoofer, but it's extremely quiet. As soon as I enable the LPF, there is no sound at all.

I've also connected the subwoofer in bridged mode on the amplifier.

What could I be doing wrong? Is there something I'm missing or overlooking?

PnP adapter in the images

Any help would be greatly appreciated.

 

[José Silva]

I think the problem is with the radio; it needs to be activated to switch to the amplifier. When I changed radios, mine had an original amplifier and it wasn't working; it had to be programmed or activated to function.

 

[Maniac Felgas]

I think the problem is with the radio; it needs to be activated to switch to the amplifier. When I changed radios, mine had an original amplifier and it wasn't working; it had to be programmed or activated to function.

Thank you so much, any ideia how I can do that coding or verify the slight chance of that being the actual problem?

Thanks

 

[East Yorkshire Retrofits]

Thank you so much, any ideia how I can do that coding or verify the slight chance of that being the actual problem?

Thanks

You don't need to change the coding

Your unit is configured to power the speakers directly. You've connected a high level to low level converter to the speaker outputs

If you reconfigure the unit for us with an external amp then it won't output a high level output

Original external amplifier communicates via BAP/MOST. Your amplifier doesn't communicate at all, it just gets fed a low level signal from the adapter

 

[Maniac Felgas]

You don't need to change the coding

Your unit is configured to power the speakers directly. You've connected a high level to low level converter to the speaker outputs

If you reconfigure the unit for us with an external amp then it won't output a high level output

Original external amplifier communicates via BAP/MOST. Your amplifier doesn't communicate at all, it just gets fed a low level signal from the adapter

Okay! Then what do I need to do to make it work?

 

[East Yorkshire Retrofits]

We don't fit aftermarket audio systems so I'm not sure sorry. In the past customers have used amplifiers with a high level input. I've never seen that specific adapter in use

 

[Maniac Felgas]

We don't fit aftermarket audio systems so I'm not sure sorry. In the past customers have used amplifiers with a high level input. I've never seen that specific adapter in use

Can you recommend any hardware / amplifier with high level input?